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If a=cos theta+i sin theta then (1+a)/(1...

If `a=cos theta+i sin theta` then `(1+a)/(1-a)=`

A

`i cot (theta)/(2)`

B

`i tan (theta)/(2)`

C

`cot (theta)/(2)`

D

`cot theta`

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The correct Answer is:
A
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HIMALAYA PUBLICATION-COMPLEX NUMBERS-QUESTION BANK
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